Self propelled saw



FIG. 1 is a left side elevational view of a walk behind concrete sawshowing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a right side elevational view thereof.

The ornamental design for a self-propelled saw, as shown and described.